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  • Comet implementation for ASP.NET?

    - by Hitchhiker
    I've been looking at ways to implement gmail-like messaging inside a browser, and arrived at the Comet concept. However, I haven't been able to find a good .NET implementation that allows me to do this within IIS (our application is written in ASP.NET 2.0). The solutions I found (or could think of, for that matter) require leaving a running thread per user - so that it could return a response to him once he gets a message. This doesn't scale at all, of course. So my question is - do you know of an ASP.NET implementation for Comet that works in a different way? Is that even possible with IIS?

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  • Spinlocks, How Much Useful Are They?

    - by unknown
    How often do you find yourself actually using spinlocks in your code? How common is it to come across a situation where using a busy loop actually outperforms the usage of locks? Personally, when I write some sort of code that requires thread safety, I tend to benchmark it with different synchronization primitives, and as far as it goes, it seems like using locks gives better performance than using spinlocks. No matter for how little time I actually hold the lock, the amount of contention I receive when using spinlocks is far greater than the amount I get from using locks (of course, I run my tests on a multiprocessor machine). I realize that it's more likely to come across a spinlock in "low-level" code, but I'm interested to know whether you find it useful in even a more high-level kind of programming?

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  • Is sstable2json broken in Cassandra 0.6.0-beta3?

    - by knorv
    I'm getting NullPointerException:s when using sstable2json in Cassandra 0.6.0-beta3: $ bin/sstable2json .../cassandra/data/system/LocationInfo-1-Data.db Exception in thread "main" java.lang.NullPointerException at java.util.Arrays$ArrayList.<init>(Arrays.java:3357) at java.util.Arrays.asList(Arrays.java:3343) at org.apache.cassandra.tools.SSTableExport.export(SSTableExport.java:255) at org.apache.cassandra.tools.SSTableExport.export(SSTableExport.java:299) at org.apache.cassandra.tools.SSTableExport.export(SSTableExport.java:323) at org.apache.cassandra.tools.SSTableExport.main(SSTableExport.java:367) I've had no problems with sstable2json when using Cassandra 0.5. Is sstable2json broken in Cassandra 0.6.0-beta3 or am I doing something wrong?

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  • NSTask or NSThread?

    - by Ben Packard
    I have some code that is attached to an NSTimer. Around 5 times every second, it interacts with another application (by emulating keystrokes) and when appropriate spits out an NSNotification, that is handled by another piece of code. While the timer code is running, the UI is unresponsive, so I can't include a 'stop' button that halts the timer. How should I handle this? A separate process (NSTask right?) or thread? Remember that at unpredictable times, the timer code will need to send some info back for processing. Thanks.

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  • Exceptions silently caught by Windows, how to handle manually?

    - by Mark Ingram
    We're having problems with Windows silently eating exceptions and allowing the application to continue running, when the exception is thrown inside the message pump. For example, we created a test MFC MDI application, and overrode OnDraw: void CTestView::OnDraw(CDC* /*pDC*/) { *(int*)0 = 0; // Crash CTestDoc* pDoc = GetDocument(); ASSERT_VALID(pDoc); if (!pDoc) return; // TODO: add draw code for native data here } You would expect a nasty error message when running the application, but you actually get nothing at all. The program appears to be running perfectly well, but if you check the output window you will see: First-chance exception at 0x13929384 in Test.exe: 0xC0000005: Access violation writing location 0x00000000. First-chance exception at 0x77c6ee42 in Test.exe: 0xC0150010: The activation context being deactivated is not active for the current thread of execution. I know why I'm receiving the application context exception, but why is it being handled silently? It means our applications could be suffering serious problems when in use, but we'll never know about it, because our users will never report any problems.

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  • Apache on linux and i18n : spawning processes or threads ?

    - by Jerome WAGNER
    Hello, I would like to understand better exactly what is going on when Apache on linux receive an HTTP request in a process pre-fork model. Let's say we have 20 Apache child processes waiting. When I receive an HTTP request, is it true to say that 1 child process will be chosen to handle the request and that this process won't handle another request from another user until the first one is finished ? I am asking the question because of a PHP limitation that states : The locale information is maintained per process, not per thread. If you are running PHP on a multithreaded server API like IIS or Apache on Windows, you may experience sudden changes in locale settings while a script is running, though the script itself never called setlocale(). This happens due to other scripts running in different threads of the same process at the same time, changing the process-wide locale using setlocale(). Thanks Jerome Wagner

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  • Boost::Asio : io_service.run() vs poll() or how do I integrate boost::asio in mainloop

    - by user300713
    Hi, I am currently trying to use boost::asio for some simple tcp networking for the first time, and I allready came across something I am not really sure how to deal with. As far as I understand io_service.run() method is basically a loop which runs until there is nothing more left to do, which means it will run until I release my little server object. Since I allready got some sort of mainloop set up, I would rather like tp update the networking loop manually from there just for the sake of simplicity, and I think io_service.poll() would do what I want, sort of like this: void myApplication::update() { myIoService.poll(); //do other stuff } This seems to work, but I am still wondering if there is a drawback from this method since that does not seem to be the common way to deal with boost::asios io services. Is this a valid approach or should I rather use io_service.run() in a non blocking extra thread?

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  • JMS Session pooling for large numbers of Topic subscribers

    - by matthewKizoom
    I'm writing an app that will create lots of JMS topic subscribers. What is best practise regarding reusing sessions? A session per subscriber? A pool of sessions? With a session per subscriber the thread count seems unreasonable. Is this a job for something like a ServerSessionPool? What I've seen so far seems to suggest that ServerSessionPool is more geared towards one receiver consuming messages concurrently rather than lots of receivers. I'm currently working with HornetQ 2.0.0GA embedded in JBoss 4.3.0CP6.

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  • Non modal "status" form

    - by David Jenings
    At the beginning of a section of C# code that could take several seconds to complete, I'd like to display a non modal form with a label that just says, "Please wait..." WaitForm myWaitForm = null; try { // if conditions suggest process will take awhile myWaitForm = new WaitForm(); myWaitForm.Show(); // do stuff } finally { if (myWaitForm != null) { myWaitForm.Hide(); myWaitForm.Dispose(); myWaitForm = null; } } The problem: the WaitForm doesn't completely display before the rest of the code ties up the thread. So I only see the frame of the form. In Delphi (my old stomping ground) I would call Application.ProcessMessages after the Show() Is there an equivalent in C#? Is there a canned "status" form that I can use in situations like this? Is there a better way to approach this? Thanks in advance. David Jennings

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  • Run a JGNAT program?

    - by anta40
    I just installed JGNAT on Windows (gnat-gpl-2010-jvm-bin.exe) This is a sample code hello.adb from the included manual: with Ada.Text_IO; use Ada.Text_IO; procedure Hello is begin Put_Line ("Hello GNAT for the JVM."); end Hello; First, compile it: jvm-gnatmake hello.adb jvm-gnatcompile -c hello.adb jvm-gnatbind -x hello.ali jvm-gnatlink hello.ali Looks fine. So let's run it: java hello Exception in thread "main" java.lang.NoClassDefFoundError: jgnat/adalib/GNAT_libc at hello.main(hello.adb) Caused by: java.lang.ClassNotFoundException: jgnat.adalib.GNAT_libc at java.net.URLClassLoader$1.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 1 more Any idea why?

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  • Outlook MAPI session exception when outlook interface is closed

    - by michele
    I'm developing a email sender that retrieve data from a database, build up a MailItem with the Outlook Interop and send it. My email sender is running by a windows service that is notified everytime there's some data to send. I'm logging on the MAPI session of Outlook without problem and everything seems to work. But... when someone open Outlook interface and then close, my service crash at the first attempt i call a SendAndReceive method, with an exception that report that the session is assigned to another thread. I'm googling around for hours and i'm listening to the application_quit event, raised by the interface closing, trying to logoff and logon again to the application...but i'm still falling in the same error. Where am i wrong?Any suggestion? Thank you in advance

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  • ffmpeg problem in ubuntu (libavcodec.so)

    - by lyuba
    I run Ubuntu and try to use the ffmpeg wrapper in Java from here: http://code.google.com/p/javacv/ It seems to work fine on other systems, but in Ubuntu the project crashes with the following mistake: Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking up function 'avcodec_decode_video2': /usr/lib/i686/cmov/libavcodec.so: undefined symbol: avcodec_decode_video2 ffmpeg is working great from the command line, though. JavaCV author recommended me to check this link: http://linux-tipps.blogspot.com/2009/05/pretending-package-is-installed-by.html Probably I'm doing something wrong, but it cannot reinstall libavcodec51 like this. So the questions are: 1. Is those solution above a good one so I should bring it to success somehow? 2. What are the other ways to solve the problem? Thank you for your suggestions in advance!

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  • Is it possible to tell IIS 7 to process the request queue in parallel?

    - by Uwe Keim
    Currently we are developing an ASMX, ASP 2.0, IIS 7 web service that does some calculations (and return a dynamically generated document) and will take approx. 60 seconds to run. Since whe have a big machine with multiple cores and lots of RAM, I expected that IIS tries its best to route the requests that arrive in its requests queue to all available threads of the app pool's thread pool. But we experience quiet the opposite: When we issue requests to the ASMX web service URL from multiple different clients, the IIS seems to serially process these requests. I.e. request 1 arrives, is being processed, then request 2 is being processed, then request 3, etc. Question: Is it possible (without changing the C# code of the web service) to configure IIS to process requests in parallel, if enough threads are available? If yes: how should I do it? It no: any workarounds/tips? Thanks Uwe

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  • The accossoryView of a UITableViewCell disappears after the visible view is changed

    - by Luca
    Hi! I'm experiencing this strange situation. I have a UITableView where, when the user selects a cell, a long (network) process begins. So, I performed this in a background thread and I placed (in the didSelectRowAtIndexPath) a UIActivityIndicatorView as the accessory view. This is what I wrote: UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:indexPath]; UIActivityIndicatorView* activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; cell.accessoryView = activityView; [activityView startAnimating]; [activityView release]; everything seems to work correctly, except that, if during a loading process (when the indicator is animated), I switch the view using a UITabBar, when I go back to the UITableView, the UIActivityIndicatorView that should still be there has disappeared. Any idea of what I did wrong? Thanks!

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  • WPF Statusbar Updates - help, I seem to be going round in circles

    - by David Ward
    I seem to be going round in circles. I have a WPF application that has a main ribbon window with a status bar. When you navigate to a "view" a user control is displayed as the content of the main window. The view has a ViewModel which handles retrieving data from the database and the View's datacontext is set to the ViewModel. What I want is to have the lengthy operation (data retrieval) run on a background thread and whilst it is running the status in the main window to report appropriately. When the background task is complete, the status should revert back to "Ready" (much the same as Visual Studio). How should I wire this together so that I can have the data access code separated out in the ViewModel whilst keeping a responsive UI? I have tried using the BackgroundWorker is various places in the code and I still end up with an unresponsive UI.

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  • Linq : problem with primary key

    - by Nickson
    I get the following error message The table/view 'TABLE1' does not have a primary key defined and no valid primary key could be inferred. This table/view has been excluded. To use the entity you will need to review your schema, add the correct keys and uncomment it when I try to add a view to an Entity Data Model. For testing, I have created a very simple view and I still get the error. below is the view definition SELECT DISTINCT TOP (100) PERCENT MIN(id) AS Expr4, MIN(EmpNo) AS Expr1, MIN(Name) AS Expr2, MIN(Category) AS Expr3 FROM dbo.MYView1 GROUP BY id does any one know of a simple work around. I have looked at this thread http://stackoverflow.com/questions/745341/can-ms-sql-views-have-primary-and-foriegn-keys but in my scenario, what is recommended is not applicable. If I could only have the view added to the Model.

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  • symfony: multiple apps, single login?

    - by gruner
    My symfony project is divided into several apps. Using the sfDoctrineGuard plugin I'd like to create another app just for login, and redirect to the appropriate app after login. My questions: • Is this advisable or does it go against how sfGuard is supposed to work? • Is there a way to redirect between applications without hardcoding the entire url? Is there a "symfony way" of doing it, or is this not how projects are supposed to function? (All I can find is this thread which is kind of vague on the specifics.)

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  • log4j.xml configuration with <rollingPolicy> and <triggeringPolicy>

    - by Mike Smith
    I try to configure log4j.xml in such a way that file will be rolled upon file size, and the rolled file's name will be i.e: "C:/temp/test/test_log4j-%d{yyyy-MM-dd-HH_mm_ss}.log" I followed this discussion: http://web.archiveorange.com/archive/v/NUYyjJipzkDOS3reRiMz Finally it worked for me only when I add: try { Thread.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); } to the method: public boolean isTriggeringEvent(Appender appender, LoggingEvent event, String filename, long fileLength) which make it works. The question is if there is a better way to make it work? since this method call many times and slow my program. Here is the code: package com.mypack.rolling; import org.apache.log4j.rolling.RollingPolicy; import org.apache.log4j.rolling.RolloverDescription; import org.apache.log4j.rolling.TimeBasedRollingPolicy; /** * Same as org.apache.log4j.rolling.TimeBasedRollingPolicy but acts only as * RollingPolicy and NOT as TriggeringPolicy. * * This allows us to combine this class with a size-based triggering policy * (decision to roll based on size, name of rolled files based on time) * */ public class CustomTimeBasedRollingPolicy implements RollingPolicy { TimeBasedRollingPolicy timeBasedRollingPolicy = new TimeBasedRollingPolicy(); /** * Set file name pattern. * @param fnp file name pattern. */ public void setFileNamePattern(String fnp) { timeBasedRollingPolicy.setFileNamePattern(fnp); } /* public void setActiveFileName(String fnp) { timeBasedRollingPolicy.setActiveFileName(fnp); }*/ /** * Get file name pattern. * @return file name pattern. */ public String getFileNamePattern() { return timeBasedRollingPolicy.getFileNamePattern(); } public RolloverDescription initialize(String file, boolean append) throws SecurityException { return timeBasedRollingPolicy.initialize(file, append); } public RolloverDescription rollover(String activeFile) throws SecurityException { return timeBasedRollingPolicy.rollover(activeFile); } public void activateOptions() { timeBasedRollingPolicy.activateOptions(); } } package com.mypack.rolling; import org.apache.log4j.helpers.OptionConverter; import org.apache.log4j.Appender; import org.apache.log4j.rolling.TriggeringPolicy; import org.apache.log4j.spi.LoggingEvent; import org.apache.log4j.spi.OptionHandler; /** * Copy of org.apache.log4j.rolling.SizeBasedTriggeringPolicy but able to accept * a human-friendly value for maximumFileSize, eg. "10MB" * * Note that sub-classing SizeBasedTriggeringPolicy is not possible because that * class is final */ public class CustomSizeBasedTriggeringPolicy implements TriggeringPolicy, OptionHandler { /** * Rollover threshold size in bytes. */ private long maximumFileSize = 10 * 1024 * 1024; // let 10 MB the default max size /** * Set the maximum size that the output file is allowed to reach before * being rolled over to backup files. * * <p> * In configuration files, the <b>MaxFileSize</b> option takes an long * integer in the range 0 - 2^63. You can specify the value with the * suffixes "KB", "MB" or "GB" so that the integer is interpreted being * expressed respectively in kilobytes, megabytes or gigabytes. For example, * the value "10KB" will be interpreted as 10240. * * @param value * the maximum size that the output file is allowed to reach */ public void setMaxFileSize(String value) { maximumFileSize = OptionConverter.toFileSize(value, maximumFileSize + 1); } public long getMaximumFileSize() { return maximumFileSize; } public void setMaximumFileSize(long maximumFileSize) { this.maximumFileSize = maximumFileSize; } public void activateOptions() { } public boolean isTriggeringEvent(Appender appender, LoggingEvent event, String filename, long fileLength) { try { Thread.sleep(1); } catch (InterruptedException e) { e.printStackTrace(); } boolean result = (fileLength >= maximumFileSize); return result; } } and the log4j.xml: <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd"> <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="true"> <appender name="console" class="org.apache.log4j.ConsoleAppender"> <param name="Target" value="System.out" /> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d [%t] %-5p %c -> %m%n" /> </layout> </appender> <appender name="FILE" class="org.apache.log4j.rolling.RollingFileAppender"> <param name="file" value="C:/temp/test/test_log4j.log" /> <rollingPolicy class="com.mypack.rolling.CustomTimeBasedRollingPolicy"> <param name="fileNamePattern" value="C:/temp/test/test_log4j-%d{yyyy-MM-dd-HH_mm_ss}.log" /> </rollingPolicy> <triggeringPolicy class="com.mypack.rolling.CustomSizeBasedTriggeringPolicy"> <param name="MaxFileSize" value="200KB" /> </triggeringPolicy> <layout class="org.apache.log4j.PatternLayout"> <param name="ConversionPattern" value="%d [%t] %-5p %c -> %m%n" /> </layout> </appender> <logger name="com.mypack.myrun" additivity="false"> <level value="debug" /> <appender-ref ref="FILE" /> </logger> <root> <priority value="debug" /> <appender-ref ref="console" /> </root> </log4j:configuration>

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  • Using DLL that using COM in C#

    - by chekalin-v
    I have been writing DLL on C++, that will be use in C#. DLL have some function, where I call hres = CoInitializeEx(NULL, COINIT_MULTITHREADED); and next call hres = CoInitializeSecurity( NULL, -1, // COM authentication NULL, // Authentication services NULL, // Reserved RPC_C_AUTHN_LEVEL_PKT, // Default authentication RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation NULL, // Authentication info EOAC_NONE, // Additional capabilities NULL // Reserved ); There are no error then I trying to use this dll in C++. But if I call function from DLL via C# application I see Error (80010106) Cannot change thread mode after it is set. I changed hres = CoInitializeEx(NULL, COINIT_MULTITHREADED); to hres = CoInitialize(NULL); After this changes error appear after CoInitializeSecurity: (80010119) Security must be initialized before any interfaces are marshalled or unmarshalled. It cannot be changed once initialized. How resolve this trouble?

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  • Compile Problem with MySQL C API on MAC OS X 10.6

    - by Dennis
    Hi guys, i've a Problem with MySQL C API and Mac OS X 10.6. When i want to compile a SQL Client Program, it aborts with this Error Message ld: library not found for -lmysqlclient collect2: ld returned 1 exit status I compile with this command: g++ -I /usr/local/mysql/include/ -L /usr/local/mysql/lib/ -lmysqlclient main.cpp I've tried the Headers and Librarys in different locations - no effect I've downloaded the headers and the Library from an other Destination - Same effect as before Any Ideas what i am doing wrong? If there is a thread allready i want to excuse (nothing found in search)! Greeting, Dennis

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  • Calling Status Bar notification from method from other class.

    - by Jez Fischer
    Firstly, I am new to both android and Java. I have two classes, my main.class and Note.class. I am calling the notification method from my Note.class in my main.class when i press a button. The issue is with this line from the Note.class : PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0); notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent); When the method is called it force closes. I believe the problem to be with the "this" in PendingIntent.getActivity(this, 0, notificationIntent, 0);, but I am unsure what to change it to. The notification code works fine if it's in the main class. I would be very grateful for any guidance. Edit: Main class : http://pastebin.com/05Yx0a48 Note.class : package com.adamblanchard.remindme.com.adamblanchard; import com.adamblanchard.remindme.R; import android.app.Activity; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.Context; import android.content.Intent; import android.os.Bundle; public class Note extends Activity { public CharSequence note = "not changed"; int HELLO_ID = 1; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); setTitle("Remind Me!"); } //Notification Method public void callNotification() { // TODO Auto-generated method stub String ns = Context.NOTIFICATION_SERVICE; final NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns); int icon = R.drawable.launcher; CharSequence tickerText = "Remind Me!"; long when = System.currentTimeMillis(); final Notification notification = new Notification(icon, tickerText, when); notification.flags |= Notification.FLAG_AUTO_CANCEL; final Context context = getApplicationContext(); CharSequence contentTitle = "Remind Me!"; CharSequence contentText = note; Intent notificationIntent = new Intent(context, AndroidNotifications.class); PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0); notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent); mNotificationManager.notify(HELLO_ID, notification); HELLO_ID++; } } Debug Output : Thread [<1 main] (Suspended (exception IllegalStateException)) Note(Activity).getSystemService(String) line: 3536 Note.callNotification() line: 37 remindme$1$1.onClick(DialogInterface, int) line: 72 AlertDialog(AlertController$ButtonHandler).handleMessage(Message) line: 159 AlertController$ButtonHandler(Handler).dispatchMessage(Message) line: 99 Looper.loop() line: 123 ActivityThread.main(String[]) line: 3647 Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method] Method.invoke(Object, Object...) line: 507 ZygoteInit$MethodAndArgsCaller.run() line: 839 ZygoteInit.main(String[]) line: 597 NativeStart.main(String[]) line: not available [native method] This is the debug output I get, plus a force close popup on the device. Edit2: Manifest xml: <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.adamblanchard.remindme" android:versionCode="3" android:versionName="0.7"> <application android:label="@string/app_name" android:icon="@drawable/ic_launcher72"> <activity android:name=".com.adamblanchard.remindme" android:label="@string/app_name"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".Note"> <intent-filter> <action android:name="Note" /> <category android:name="android.intent.category.DEFAULT"/> </intent-filter> </activity> </application> <uses-sdk android:minSdkVersion="1"></uses-sdk> </manifest> Stack traces (Are these what you mean?): Thread [<1> main] (Suspended (exception ActivityNotFoundException)) Instrumentation.checkStartActivityResult(int, Object) line: 1404 Instrumentation.execStartActivity(Context, IBinder, IBinder, Activity, Intent, int) line: 1378 remindme(Activity).startActivityForResult(Intent, int) line: 2827 remindme(Activity).startActivity(Intent) line: 2933 remindme$1$1.onClick(DialogInterface, int) line: 82 AlertDialog(AlertController$ButtonHandler).handleMessage(Message) line: 159 AlertController$ButtonHandler(Handler).dispatchMessage(Message) line: 99 Looper.loop() line: 123 ActivityThread.main(String[]) line: 3647 Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method] Method.invoke(Object, Object...) line: 507 ZygoteInit$MethodAndArgsCaller.run() line: 839 ZygoteInit.main(String[]) line: 597 NativeStart.main(String[]) line: not available [native method]

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  • Frequent Netbeans freezes

    - by danilo
    I'm using Netbeans 6.8 for PHP projects located on network drives in a Windows network. Frequently, the IDE gets really slow (like a temporary freeze) to a point where it's totally unusable. At first it seems like a total crash, but after some time (might be sevaral minutes) the IDE works again as before. This happens with Netbeans 6.7 as well as 6.8 on my Windows XP 32-bit installation. I'm using Java 1.6.0_13. This is a fresh Netbeans installation, so it can't have to do with too many temp files. I assume it has to do with the frequent code checks that Netbeans does. It's probably not very fast when doing this over the network connection. But it can't be that this feature renders the IDE useless... This thread deals with the same issue http://forums.netbeans.org/viewtopic.php?t=5548. Does anyone know a solution to this problem?

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  • Help needed with InvokeRequired for Web.UI

    - by Ali
    I have a multi-threaded application in C# which tries to write to a TextBox in a Windows.Forms created by another thread. As threads cannot modify what has not been created by them, I was using InvokeRequired as shown on the code below, to solve this problem. public delegate void MessageDelegate(Communication message); void agent_MessageReceived(Communication message) { if (InvokeRequired) { BeginInvoke(new MessageDelegate(agent_MessageReceived), new object[] { message }); } else { TextBox1.Text += message.Body; } } Now I need to do the same for a TextBox in an ASP.NET app, but apparently neither InvokeRequired nor BeginInvoke exist for TextBox in a Web.UI. What can I do?

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  • C++ Access violation when calling dll function

    - by Manjoor
    I have a function definition in my VC++ Win32 DLL DEMO2_API void ProcessData(char* i_buff, unsigned short i_len, char* o_buf, unsigned *o_len, unsigned short *errorCode) { __describe (i_buff,&i_len,o_buf,o_len,errorCode); } This dll function is called by a c# application. When called, it generate access violation exception. After reasearching i found, the cause for my problem. http://social.msdn.microsoft.com/Forums/en-US/csharplanguage/thread/6e843243-baf4-4eb1-8a20-c691ad47762c But could not understand what exactly they are doinng in example code. Can someone explain it so me? And what would be P/Invoke signature in c# after externally allocating memory?

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  • Java sound doesn't work under Linux

    - by Cliff
    Help! I'm getting frustrated by the individual hoops I have to go through to eek sound out of my speakers when running Java apps on Linux platforms! I just installed Fedora 12 and after downloading and running the Java Sound Demo I get exceptions. If I run just a vanilla Java program that plays a wav file it runs silently with no sound and no exceptions. Every other app seems to play sound. I also took some advice from this thread in the Ubuntu forums which almost seemed to work. (Installing aoss got rid of the initial exceptions in the sound demo but I still hear nothing when I play.) can somebody help me figure out what's wrong?

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